Brain Teaser

I must warn you first I don’t really know the answer: three men check in late one night at a motel. The Night mgr charges them each $10. For a total of $30.They pay and then go to their rooms. The manager forgot the weekday special is 3 rooms for $25. The mgr gives the bellboy $5 and says hey go tell the men it was only $25 and give them back $5. The bell boy decides to keep $2 and give each guy back a $1.
So the men now paid $9 each for a total of $27 and the bellboy kept $2. What happened to the other dollar?